# str1="hello world"
# str2="001"
# print(str1,str2)
# print("123--{0}".format(4))
# str3="hello"
# print(f"123--{str3}")

for i in range(0,100,2):
    print("========开始下载==========")
    if i==100:
        print("下载完成")
    else:
        str4="*"*(i//2)+"."*((100-i)//2)
        print(f"{i}%[{str4}]")